<template>
    <div class="list" ref="wrapper">
        <div>
            <div class="area">
                <div class="title border-topbottom">当前城市</div>
            <div class="button-list">
                <div class="button-wrapper">
                    <div class="button">{{this.currentCity}}</div>
                </div>
            </div>
            </div>
            <div class="area">
                <div class="title border-topbottom">热门城市</div>
            <div class="button-list">
                <div class="button-wrapper" v-for="item in hot" :key="item.id" @click="handleCityClick(item.name)">
                    <div class="button">{{item.name}}</div>
                </div>
            </div>
            </div>
            <div class="area"
                 v-for="(item,key) in cities" 
                 :key="key"
                 :ref="key"
            >
                <div class="title border-topbottom">{{key}}</div>
                <div class="item-list">
                    <div class="item border-bottom" v-for="innerItem in item" :key="innerItem.id" @click="handleCityClick(innerItem.name)">{{innerItem.name}}</div>
                </div>
            </div>
        </div>
    </div>
</template>

<script>
import Bscroll from 'better-scroll'
import {mapState,mapMutations} from 'vuex'
export default {
    name:'CityList',
    props:{
        hot: Array,
        cities:Object,
        letter:String
    },
    methods:{
        handleCityClick (city) {
            this.changeCity(city)
            this.$router.push('/')
        },
        ...mapMutations(['changeCity'])
    },
    mounted () {
        this.scroll = new Bscroll(this.$refs.wrapper)
    },
    watch:{
        letter () {
            if(this.letter){
                const element = this.$refs[this.letter][0]
                this.scroll.scrollToElement(element)
            }
        }
    },
    computed: {
        ...mapState({
            currentCity: 'city'
        })
    }
}
</script>

<style lang="stylus" scoped>
    @import '~styles/varibles.styl'
    .border-topbottom
        &:before
            border-color :#ccc
        &:after
            border-color:#ccc
    .border-bottom
        &:before
            border-color :#ccc
    .list
        overflow: hidden
        position:absolute
        top:1.58rem
        bottom :0
        left:0
        right :0
        .title
            line-height :.54rem
            background :#eee
            padding-left :.2rem
            color :#666
            font-size .26rem
        .button-list
            overflow: hidden
            padding :.1rem .6rem .1rem .1rem
            .button-wrapper
                float: left
                width :33.33%
                .button
                    text-align :center
                    padding :.1rem 0
                    margin :.1rem .1rem
                    border :.02rem solid #ccc
                    border-radius :.06rem
        .item-list
        .item
            line-height :.76rem
            padding-left :.2rem 
</style>